Published in Freyn. (1838). In: Willk. & Lange, Prodr. Fl. Hispan. 3: 929 (1880) (Non Nutt. in Torr. & A. Gray, Fl. N. Amer. 1: 22).
The native range of this species is SW. Canada to W. U.S.A. It is a perennial and grows primarily in the temperate biome.